摘要
Abstract
A stepless adjustment and cutting system for U-shaped steel is studied,which solves the cutting problem of U-shaped steel products with stepless changes in bottom width,height and thickness within a certain range.The existing technology usually involves making corresponding moving and fixed knives based on product specifications.When switching product specifications,the corresponding moving and fixed knives are replaced manually,which is time-consuming and labor-intensive,requires high technical level of workers,and has low efficiency.In order to solve these problems,a set of system is designed,which integrates a pin device,a press machine,stepless adjustment of the cutting blade for the material cutting core,precise positioning of the cutting blade base,hydraulic system,electrical protection device,etc.When switching the specifications of the U-shaped steel product(i.e.bottom width,height and thickness)within a certain size range,the size between the cutting blades on both sides of the material cutting core can be adjusted to the required width specification simply by adjusting the screw rod,and the operation is simple and efficient.The required maximum shear force is calculated through the shear force formula and shear principle;the strength and stiffness of the shear frame structure are calculated using finite element analysis software,verifying the reliability of the structural design.关键词
冷弯U形钢/无级调整剪切/开口型材/液压/有限元Key words
cold formed U-shaped steel/stepless adjustment cutting/open profile/hydraulic/Finite element analysis分类
机械制造
